The IMI Defense OTS (Over The Sight) Drop In Key-Mod is machined out of an aircraft grade aluminium, designed specially to easily drop in on the rifle with over the front sight extension. This ultra light weight Battle handguard  2 piece Key-Mod handguard is a perfectly tight fit, ultra slim cross section,  T-marked 1913 top picatinny rail for perfect mission adaptability  – the choice of a true warrior.